Electrodeposition of CdTe from Basic Aqueous Solutions Containing Diethylenetriamine
Electrodeposition of CdTe from Basic Aqueous Solutions Containing Diethylenetriamine
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含二乙烯三胺的碱性水溶液电沉积 CdTe
DOI：
10.4139/sfj.53.535
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Y. Awakura
中科院分区：
文献类型：
--
作者：
K. Murase;Takeshi Honda;T. Hirato;Y. Awakura
研究了在 700°C 或更高温度下使用碱性水电解浴在镀金基底上进行 CdTe 的恒电位阴极电沉积，其中 Cd (II)-和 Te (IV) - 物质分别溶解形成 Cd (dien)22+ 和 TeO32- 离子（二烯：二亚乙基三胺）。电沉积 CdTe 的化学计量可通过改变镀液的 Cd (II)/Te (IV) 浓度比、pH 值和/或二亚乙基三胺含量来控制。通过绘制 Cd-Te-dien-H2O 和 Cd-Te-NH3-H2O 体系的电位-pH 图，从热力学角度讨论了两种具有不同络合剂（二亚乙基三胺和氨）的基本介质之间沉积行为的差异。还根据 Cd (II) 和 Te (IV) 物种之间的离子间相互作用讨论了沉积机制。使用二乙烯三胺代替氨可以将电解槽的温度提高到 90°C，从而在各种实验条件下无需任何后处理即可获得高度结晶的 CdTe 沉积物。
Potentiostatic catholic electrodeposition of CdTe on gold-plated substrate was studied at 700°C or more using basic aqueous electrolytic baths in which Cd (II)-and Te (IV) -species were dissolving to form Cd (dien)22+ and TeO32- ions, respectively (dien: diethylenetriamine). The stoichiometry of CdTe electrodeposited can be controlled by changing the Cd (II)/Te (IV) concentration ratio, pH, and/or the diethylenetriamine content of the baths. Differences in the deposition behavior between two basic media with different complexing agents, diethylenetriamine and ammonia, were discussed thermodynamically with potential-pH diagrams drawn for the Cd-Te-dien-H2O and the Cd-Te-NH3-H2O systems. The deposition mechanism was also discussed in terms of interionic interaction between Cd (II) and Te (IV) species. The use of diethylenetriamine instead of ammonia made it possible to raise the temperature of electrolytic baths to 90°C, resulting in highly crystalline CdTe deposits without any post-treatment under a wide range of experimental conditions.